+ derat@ for more info:

The example failed test logs:

https://stainless.corp.google.com/browse/chromeos-autotest-results/swarming-3f400cfa3ebd7411/
https://stainless.corp.google.com/browse/chromeos-autotest-results/swarming-3f400cf787428a11/
https://stainless.corp.google.com/browse/chromeos-autotest-results/swarming-3f400cf5340bd911/

I think every release builder is running bvt-tast-cq as it's in release template.

From autoserv.INFO in http://stainless/browse/chromeos-autotest-results/swarming-3f400cfa3ebd7411/ :

08/10 21:27:25.829 WARNI|              test:0637| The test failed with the following exception
Traceback (most recent call last):
  File "/usr/local/autotest/client/common_lib/test.py", line 598, in _exec
    _cherry_pick_call(self.initialize, *args, **dargs)
  File "/usr/local/autotest/client/common_lib/test.py", line 746, in _cherry_pick_call
    return func(*p_args, **p_dargs)
  File "/usr/local/autotest/server/site_tests/tast/tast.py", line 122, in initialize
    self._tast_path = self._get_path((self._TAST_PATH, self._SSP_TAST_PATH))
  File "/usr/local/autotest/server/site_tests/tast/tast.py", line 179, in _get_path
    raise error.TestFail('None of %s exist' % list(paths))
TestFail: None of ['/usr/bin/tast', '/usr/local/tast/tast'] exist

Per go/tast-infra, "the Tast files included in autotest_server_package.tar.bz are extracted to /usr/local/tast in the container". I don't know anything about Skylab, but I'd guess that that's not happening here for some reason.

I think it's just a matter of getting SSP working.

Re #4, does that mean it's duplicate from  Issue 871439 ?

This should be fixed, now that SSP tests run correctly on skylab.
Sadly, no tast test is in the staging test suite at this point.

Let's fix that first: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1178472

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/60e2bdd7c8b7d289220a2cd35287ffd4d4fedbd8

commit 60e2bdd7c8b7d289220a2cd35287ffd4d4fedbd8
Author: Prathmesh Prabhu <pprabhu@chromium.org>
Date: Tue Aug 21 18:19:52 2018

skylab_staging: Add a tast test

BUG= chromium:873695 
TEST=None

Change-Id: I5b8586b51fae60cd8ba18cb637a84d4bc65dcffd
Reviewed-on: https://chromium-review.googlesource.com/1178472
Reviewed-by: Dan Erat <derat@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
Commit-Queue: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>

[add] https://crrev.com/60e2bdd7c8b7d289220a2cd35287ffd4d4fedbd8/server/site_tests/tast/control.skylab-staging